As of 2023, China has the highest installed solar PV capacity in the world, followed by the United States, India, and Germany.

The Solar Investment Tax Credit (ITC) is a federal tax credit in the United States that provides a financial incentive for businesses and individuals to install solar energy systems.

The Paris Agreement is an international agreement that aims to limit global warming and promote the transition to renewable energy sources, including solar energy.

Net metering policies allow solar energy system owners to sell excess electricity they generate back to the grid at a predetermined rate.

Germany has a feed-in tariff policy that guarantees a fixed price for solar energy generated by residential and commercial solar systems.

The Solar Energy Technologies Office (SETO) is a federal office in the United States that supports research and development of solar technologies.

The United States has a renewable portfolio standard (RPS) that requires utilities to generate a certain percentage of their electricity from renewable sources, including solar energy.

The Solar Energy Industries Association (SEIA) is a trade association in the United States that promotes the adoption of solar energy systems.

The International Solar Alliance (ISA) is an international organization that works to promote the development and deployment of solar energy technologies.

The Solar Energy Research Institute of Singapore (SERIS) is a research institute that supports research and development of solar technologies.

Germany has a carbon tax policy that places a price on carbon emissions, including those from fossil fuel-based electricity generation.

The Clean Energy Standard (CES) proposed by the Biden administration in the United States aims to promote the adoption of solar energy systems.

Germany has a solar energy development target of achieving 100% of its electricity generation from renewable sources by 2050.

The Solar Power Europe association is a trade association that promotes the adoption of solar energy systems.

China has a solar energy development target of achieving 40% of its electricity generation from renewable sources by 2030.